Webster's Unabridged Dictionary - Letter H - Page 57

Hybridist (n.) One who hybridizes.

Hybridity (n.) Hybridism.

Hybridizable (a.) Capable of forming a hybrid, or of being subjected to a hybridizing process; capable of producing a hybrid by union with another species or stock.

Hybridization (n.) The act of hybridizing, or the state of being hybridized.

Hybridized (imp. & p. p.) of Hybridize

Hybridizing (p. pr. & vb. n.) of Hybridize

Hybridize (v. t.) To render hybrid; to produce by mixture of stocks.

Hybridizer (n.) One who hybridizes.

Hybridous (a.) Same as Hybrid.

Hydage (n.) A land tax. See Hidage.

Hydantoic (a.) Pertaining to, or derived from, hydantoin. See Glycoluric.

Hydantoin (n.) A derivative of urea, C3H4N2O2, obtained from allantion, as a white, crystalline substance, with a sweetish taste; -- called also glycolyl urea.

Hydatid (n.) A membranous sac or bladder filled with a pellucid fluid, found in various parts of the bodies of animals, but unconnected with the tissues. It is usually formed by parasitic worms, esp. by larval tapeworms, as Echinococcus and Coenurus. See these words in the Vocabulary.

Hydatiform (a.) Resembling a hydatid.

Hydatoid (a.) Resembling water; watery; aqueous; hyaloid.

Hydr- () See under Hydro-.

Hydras (pl. ) of Hydra

Hydrae (pl. ) of Hydra

Hydra (n.) A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads, one of which, when cut off, was immediately succeeded by two others, unless the wound was cauterized. It was slain by Hercules. Hence, a terrible monster.

Hydra (n.) Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.

Hydra (n.) Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker.

Hydra (n.) A southern constellation of great length lying southerly from Cancer, Leo, and Virgo.

Hydrachnid (n.) An aquatic mite of the genus Hydrachna. The hydrachnids, while young, are parasitic on fresh-water mussels.

Hydracid (n.) An acid containing hydrogen; -- sometimes applied to distinguish acids like hydrochloric, hydrofluoric, and the like, which contain no oxygen, from the oxygen acids or oxacids. See Acid.

Hydracrylic (a.) Pertaining to, or designating, an isomeric variety of lastic acid that breaks down into acrylic acid and water.

Hydractinian (n.) Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata.

Hydraemia (n.) An abnormally watery state of the blood; anaemia.

Hydragogue (a.) Causing a discharge of water; expelling serum effused into any part of the body, as in dropsy.

Hydragogue (n.) A hydragogue medicine, usually a cathartic or diuretic.

Hydramide (n.) One of a group of crystalline bodies produced by the action of ammonia on certain aldehydes.

Hydramine (n.) One of a series of artificial, organic bases, usually produced as thick viscous liquids by the action of ammonia on ethylene oxide. They have the properties both of alcohol and amines.

Hydrangea (n.) A genus of shrubby plants bearing opposite leaves and large heads of showy flowers, white, or of various colors. H. hortensis, the common garden species, is a native of China or Japan.

Hydrant (n.) A discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks; a water plug.

Hydranth (n.) One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. See Illust. of Hydroidea.

Hydrargochloride (n.) A compound of the bichloride of mercury with another chloride.

Hydrargyrate (a.) Of or pertaining to mercury; containing, or impregnated with, mercury.

Hydrargyrism (n.) A diseased condition produced by poisoning with hydrargyrum, or mercury; mercurialism.

Hydrargyrum (n.) Quicksilver; mercury.

Hydrarthrosis (n.) An effusion of watery liquid into the cavity of a joint.

Hydrastine (n.) An alkaloid, found in the rootstock of the golden seal (Hydrastis Canadensis), and extracted as a bitter, white, crystalline substance. It is used as a tonic and febrifuge.

Hydra-tainted (a.) Dipped in the gall of the fabulous hydra; poisonous; deadly.

Hydrate (n.) A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts.

Hydrate (n.) A substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime.

Hydrated (imp. & p. p.) of Hydrate

Hydrating (p. pr. & vb. n.) of Hydrate

Hydrate (v. t.) To form into a hydrate; to combine with water.

Hydrated (a.) Formed into a hydrate; combined with water.

Hydration (n.) The act of becoming, or state of being, a hydrate.

Hydraulic (a.) Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or dock.

Hydraulical (a.) Hydraulic.

Hydraulicon (n.) An ancient musical instrument played by the action of water; a water organ.

Hydraulics (n.) That branch of science, or of engineering, which treats of fluids in motion, especially of water, its action in rivers and canals, the works and machinery for conducting or raising it, its use as a prime mover, and the like.

Hydrazine (n.) Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.

Hydrencephsloid (a.) Same as Hydrocephaloid.

Hydria (n.) A water jar; esp., one with a large rounded body, a small neck, and three handles. Some of the most beautiful Greek vases are of this form.

Hydriad (n.) A water nymph.

Hydric (a.) Pertaining to, or containing, hydrogen; as, hydric oxide.

Hydride (n.) A compound of the binary type, in which hydrogen is united with some other element.

Hydriform (a.) Having the form or structure of a hydra.

Hydrina (n. pl.) The group of hydroids to which the fresh-water hydras belong.

Hydriodate (n.) Same as Hydriodide.

Hydriodic (a.) Pertaining to, or derived from, hydrogen and iodine; -- said of an acid produced by the combination of these elements.

Hydriodide (n.) A compound of hydriodic acid with a base; -- distinguished from an iodide, in which only the iodine combines with the base.

Hydro- () Alt. of Hydr-

Hydr- () A combining form from Gr. /, /, water (see Hydra).

Hydr- () A combining form of hydrogen, indicating hydrogen as an ingredient, as hydrochloric; or a reduction product obtained by hydrogen, as hydroquinone.

Hydrobarometer (n.) An instrument for determining the depth of the sea water by its pressure.

Hydrobilirubin (n.) A body formed from bilirubin, identical with urobilin.

Hydrobranchiata (n. pl.) An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.

Hydrobromate (n.) Same as Hydrobromide.

Hydrobromic (a.) Composed of hydrogen and bromine; as, hydrobromic acid.

Hydrobromide (n.) A compound of hydrobromic acid with a base; -- distinguished from a bromide, in which only the bromine unites with the base.

Hydrocarbon (n.) A compound containing only hydrogen and carbon, as methane, benzene, etc.; also, by extension, any of their derivatives.

Hydrocarbonaceous (a.) Of the nature, or containing, hydrocarbons.

Hydrocarbonate (n.) A hydrocarbon.

Hydrocarbonate (n.) A hydrous carbonate, as malachite.

Hydrocarbostyril (n.) A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril.

Hydrocarburet (n.) Carbureted hydrogen; also, a hydrocarbon.

Hydrocauli (pl. ) of Hydrocaulus

Hydrocaulus (n.) The hollow stem of a hydroid, either simple or branched. See Illust. of Gymnoblastea and Hydroidea.

Hydrocele (n.) A collection of serous fluid in the areolar texture of the scrotum or in the coverings, especially in the serous sac, investing the testicle or the spermatic cord; dropsy of the testicle.

Hydrocephalic (a.) Relating to, or connected with, hydrocephalus, or dropsy of the brain.

Hydrocephaloid (a.) Resembling hydrocephalus.

Hydrocephalous (a.) Having hydrocephalus.

Hydrocephalus (n.) An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously.

Hydrochlorate (n.) Same as Hydrochloride.

Hydrochloric (a.) Pertaining to, or compounded of, chlorine and hydrogen gas; as, hydrochloric acid; chlorhydric.

Hydrochloride (n.) A compound of hydrochloric acid with a base; -- distinguished from a chloride, where only chlorine unites with the base.

Hydrocorallia (n. pl.) A division of Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids in life project from small pores in the coral and resemble those of other hydroids. See Millepora.

Hydrocyanate (n.) See Hydrocyanide.

Hydrocyanic (a.) Pertaining to, or derived from the combination of, hydrogen and cyanogen.

Hydrocyanide (n.) A compound of hydrocyanic acid with a base; -- distinguished from a cyanide, in which only the cyanogen so combines.

Hydrodynamic (a.) Alt. of Hydrodynamical

Hydrodynamical (a.) Pertaining to, or derived from, the dynamical action of water of a liquid; of or pertaining to water power.

Hydrodynamics (n.) That branch of the science of mechanics which relates to fluids, or, as usually limited, which treats of the laws of motion and action of nonelastic fluids, whether as investigated mathematically, or by observation and experiment; the principles of dynamics, as applied to water and other fluids.

Hydrodynamometer (n.) An instrument to measure the velocity of a liquid current by the force of its impact.

Hydro-electric (a.) Pertaining to, employed in, or produced by, the evolution of electricity by means of a battery in which water or steam is used.

Hydro-extractor (n.) An apparatus for drying anything, as yarn, cloth, sugar, etc., by centrifugal force; a centrifugal.

Hydroferricyanic (n.) Pertaining to, or containing, or obtained from, hydrogen, ferric iron, and cyanogen; as, hydroferricyanic acid. See Ferricyanic.

Hydroferrocyanic (a.) Pertaining to, or containing, or obtained from, hydrogen, ferrous iron, and cyanogen; as, hydroferrocyanic acid. See Ferrocyanic.

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